Apparatus for consuming smoke in stoves and furnaces.



No. 858,106. I PATENTED JUNE 25, 1907.-

0. J. Roux. APPARATUS FOR cousumme SMOKE IN STOVES AND FURNACES.

1 APPLIGATION FILED 00114, 1-904.

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' No. 858,106. PATENTED JUNE 25, 1907. 0. J. ROU-X.

APPARATUS FOR oomsumme SMOKE IN STOVES AND FURNACES.

APPLICATION FILED 001.14, 1904.

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.PATENTED JUNE 25, 1907.

' 0 J. ROUX. APPARATUS FOR GONSUMING SMOKE IN STOVESAND FURNACES.

APPLICATION FILED our. 14, 1904.

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, UNITED. STATES PATENT OFFICE.

CHARLES JOSEPH ROUX, OF PARIS, FRANCE.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed October 14, 1904. Serial No. 228,419.

To all whom it may concern:

Be it known that I, CHARLES J osnrn ROUX, of 12 Rue Doudeauville, in thecity of Paris, Republic of France, mechanician, have inventedImprovements Relating to Apparatus for Consuming Smoke in Stoves andFurnaces, of which the following is a full, clear, and eXactdescription.

This invention has reference to apparatus for consuming smoke in stovesand furnaces and is applicable to domestic and industrial By its meanscomplete combustion may be obtained and consequently absoluteconsumption of smoke, whatever the nature of the fuel employed may be,as soon as normal conditions have been established, even with thesoftest coals.

According to this invention the improved apparatus consists broadly of afurnace with double Walls, between which is left a vacant space openingat its upper part into the furnace and conducting the gases and smoke toa second combustion center, and one or more -openings formed in theinner wall of the furnace at the level of the incandescent zone of thefuel and permitting of the passage of a jet of kindled gas supplyingthis second center of combustion. This kindled jet of gas, furnished bythe incandescent zone of the fuel, not containing any smoke but on thecontrary possessing air in excess, is consequently at a very hightemperature; its ob jects are; to produce afsuction or draft of thegases and of the outer air, to increase the draft, to producere-ignition and the complete combustion of the gases and of the smokeconducted by the vacant space surrounding the furnace and raised by thislat ter to a high temperature.

In the accompanying drawings which are given by Way of example only, theinvention is shown applied to the furnace of a generator; Figure 1 inlongitudinal section, Figs. 2 and 3 in cross section on the line AA andBB of Fig. 1, Fig. 4 in horizontal section on the line CC of Fig. 1 andFig. 5 in vertical section on the line D-D of Fig. 4:.

In all the figures similar letters of reference are employed todesignate like parts.

In the drawing the grate a is comprised between two walls I) separatedby a certain distance from the walls of the furnace in such a manner asto leave free between them and these latter the intervals 0, freelycommunicating at the upper part with the furnace.

These intervals 0 communicate by means of bent flues d with the chamberse situated Into these chambers 6 also open apertures fv formed in therear wall of the furnace and placing in communication the incandescentzone of the fuel with the chambers (1. These apertures f are provided asnear as possible to the grate and are inclined as shown in Fig. 1 inorder to retain the fuel and prevent the same from falling, at the timeof charging, into the chambers c. On the other hand the outer air isadmitted'into each of the intervals 0 through an opening. 9 formed inthe front wall and is guided by an inclined partition 7L terminating atthe entrance to the fines d.

The rear wall i of the furnace completely insulates the furnace from therest of the generator, with which this furnace communicates only by Wayof the apertures f and the fines d. This rear Wall i carries a guard tadapted to protect the boilers against the high heat produced by thesecond center of combustion, and also to prevent the gases of thissecond center of combustion from imparting too quickly their calories tothese boilers. This guard i madeof refractory ilabs forms the top of there-ignition chamers.

When the furnace described above is kindled the following phenomena areobservable: Upon kindling, the fuel being distributed in a normal layerover the grate, the flames, smoke and the gases escape through theapertures f and at the same time through the intervals 0, the lines (1and the chambers e. WVhen the fuel is well alight, a fresh quantity offuel is introduced so that the level of this latter comes above thesummit of the apertures This fresh fuel becomes incandescent and thegrate is then covered with a height of fuel in a state of ignitionextending beyond the summit of the apertures If a fresh charge of fuelis then supplied, the smoke and gases will be unable to pass through theapertures f as these latter are obstructed, so that they mustnecessarily pass through the intervals 0 and the flues d in order toreach the chambers 6. But at the same time as the draft of the chimneyacts ITO in a state of ignition, there escapes from these apertures ajet offlame carrying with it a large proportion of the air sucked in bythe lower part of the grate, this air having passed through only a smalllayer of ignited fuel, it follows that the flames issuing through theapertures f constitute a gaseous jet which is exceedingly oxidizing, andwhich may be compared with that of a blowpipe;-'its effect is tospeedily raise the chambers e to a high temperature adapted forcombustion.

The smoke and gases issuing at the upper part of the flues d mingletogether and become intimately mixed with the secondary air which isconducted by the partition h to the bottom of the fiues d and the finalmixture thus enters the chambers a under the gaseous jets issuing fromthe orifices f in a highly comburant atmosphere and raised to anexceedingly high temperature by the action of these gaseous jets. Thismixture of smoke, gases and secondary airis thus obliged to pass upwardthrough the oxidizing gaseous jets, and, in these conditions, the solidcarbon which is carried with and the hydrocarbons are kindled andcompletely c0nsumed. Each of these chambers 6 forms a second center ofcombustion in which all the combustible elements constituting the smoke.

burn completely. The products of this secondary combustion issue throughthe apertures e and in order to discharge themselves, follow theordinary flues comprised in the generator. The action of the secondcenter of combustion having started continues thus indefinitely so longas the furnace is charged with fuel.

The appliance described is applicable to furnaces of all kinds and alsoto cooking stoves and ranges.

The form, dimensions, detail arrangement and the nature of the materialsemployed will vary in accordance with the various applications.

Claims 1. Asmoke consuming furnace, having the rear wall of its fire boxprovided with inclined openings on about a level with the grate, areignitionchamber in rear of the fire box and into which the saidopenings lead, flues for conveying the gases and smoke from the upperpart of the fire box to the reignition chamber below the openings in therear wall of the fire box, and fines for delivering air to the firstnamed flues at the entrance of said fines to the reignition chamber.

2. A smoke-consuming furnace having in its fire box, walls spaced fromits side walls and terminating short of the top of said side walls, thefront wall of the furnace having openings leading to the spaces betweenthe said walls and side walls of the heater, the rear wall of the firebox being provided with upwardly and rearwardly inclined openingsbetween the said walls and just above the grate, chambers at the rear ofthe rear wall of the fire box and into which the openings in the rearwall lead, fiues leading from the to of the spaces between the saidwalls and the side walls of the furnace to the bottom of the saidchambers, and partitions in the said spaces and leading from above theopenings in the front wall and terminating at the entrance to the saidflues, substantially as herein shown and described.

3. A smoke-consuming furnace having on the sides of its fire box spacescommunicating with the outer air through openings in the front wall ofthe furnace, the rear wall of the fire box being provided with inclinedopenings above the grate, chambers at the rear of the rear wall of thefire box and into which the openings in the rear wall lead, fluesleading from the top of the side spaces of the fire box to the bottomsof the said chambers, the tops of the fines being in step form, andmeans for guiding the air entering the openings in the said spaces tothe said flues, substantially as described.

4;. A smoke-consuming furnace having on the sides of its fire box spacescommunicating with the outer air through openings in the front wall ofthe furnace, the rear wall of the fire box being provided with openingsabove the grate, chambers at the rear of the rear wall of the fire boxand into which the open ings in the rear wall lead, fiues leading fromthe said spaces of the firebox to the chambers, and means for guidingthe air entering the said spaces to the said fines, substantially asdescribed.

5. Av smoke-consuming furnace, having spaces at the sides of its firebox and having the rear wall of the fire box provided with an upwardlyinclined opening, opening into the fire box just above the grate, areignition chamber at the rear of the fire box and into which the saidopening leads, the opening being of awidth equal to that of the chamber,fines leading from the top of the said spaces to the bottom of saidchamber, and means for supplying air to said fiues, substantially asherein shown and described.

The foregoing specification of my improvements relating to apparatus forconsuming smoke in stoves and furnaces signed by me this 30th day ofSeptember, 1904.

CHARLES JOSEPH ROUX.

Witnesses LAURENT PACHON, MAURICE H. PIGNET.

